Driving-drum for railway-cables



(No Model.) 3 Sheets-Sheet 1.

P. A -J. BEIGEL. DRIVING DRUM FOR RAILWAY GABLES.

No. 385,230. Patented lune 26, 1888.

3 Sheets-Sheet 2.

(No Model.)

7 A. J. BEIGEL.

DRIVING DRUM FOR RAILWAY GABLES.

Patented June '26, 1888.

N. PtTEHS, Phnmmho n hun Washinglnn, D. c.

(No Modei.) 3 Sheets-Shed 3. .F.A.J.BEIGEL.

DRIVING DRUM FOR RAILWAY GABLES] No. 385,230. Patented June 26, 1888..

IINITED STATE PATENT Urricn.

A. JOHN BEIGEL, OF ST. LOUIS, MISSOURI.

DRIVING-DRUM FOR RAlLWAY GABLES.

SPECIFICATION forming part of Letters Patent No. 385,230, dated June 26,18188. Application filed November 10, 1887. Serial No. 254,531. (Nomodel.)

To all whom it may concern:

Be it known that I, F. A. JOHN BEIGEL, of the city of St. Louis, in theState of Missouri, have invented a certain new and useful Improvement inDriving -Drnms for Railway- Cables, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming part of this specification.

To prevent stretching or slipping of the cable on the driving-drum, thedrum is made up ofa fast pulley and several loose pulleys, all but one(the fast pulley) of which are driven by frictional bearing on a steppedextension of the fast pulley. Each pulley is grooved at the periphery toreceive the cable, and the loose pulleys are made of grad ually-increasi ng diameter from the fast pulley to and including the onemost distant therefrom, so that each will do its share in drawing thecable, while it will slip backward on the stepped extension of the fastpulley rather than stretch the cable or cause the cable to slip in thegroove. There is a means for adjusting the amount of friction betweenthe fast pulley and the loose pulleys.

Figure I is a side elevation of the device. Fig. II is a top view of thesame. Fig. 1F is a modification. Fig. IIIisasection at III III, Fig. I.Fig. IV is an enlarged detail section of the driving-drum at III III,Fig. I. Fig. V is a side elevation of the device showing thedriving-drum having loose pulleys of gradually-increasing diameter. Fig.VI is ascction at VI VI, Fig. V. Fig. VII is an enlarged section of thedriving-dru1n at VI VI, Fig. V.

1 is the railway-cable, whose ends 2 and 3 extend along the line ofrailway, as usual. The direction in which the cable runs is indicated byarrows. The cable is carried around a pulley, 4, of a stretching device,5, of any suitable construction.

6 is the shaft of the driving drum, which may be driven by any propermeans.

7 is a hub keyed fast to the shaft.

8 is a fast pulley, which is grooved circumferentially, and which iscast upon the hub or otherwise made fast thereto.

9, 10, 11, and 12 are annular steps or bearings upon one side of thefast pulley, having decreasing diameter from the pulley 8.

13, 14, 15, and 16 are a number of grooved loose pulleys, whose hubs fitclosely the steps or bearings 9, 10, 11, and 12, respectively. The fitis not, however, so tight as to prevent each loose pulley turning on itshearing or step. The pulleys are preferably in cont-act with each otherat the rims, so as to mutually brace each other.

17 are bell-crank levers, of which there is one or more for each of theloose pulleys. The levers are fulcrumed at 18 to the steps or bearings.

19 is a brakeashoe on the shorter arm of each of the levers, said shoe,bearing against the hub of one of the pulleys, (13 14 16,) so as toproduce friction and check the rotation of the pulley on the step orbearing.

20 are strong springs attached by hooks 22 to the long arms of thelevers 17.

21 are screw-rods secured to the ends of the springs by hooks 22, asshowmandpassiug through a bracket, 23, fixed to the hub.

24 are nuts on the rods 21 which bearagainst the inner sides of thebracket, and which give means for increasing or diminishing the tensionof the springs 20. It will be seen that by increasing the tension of thesprings the friction on the loose pulleys is increased, so that therewill be increased resistance to the turning of the pulleys on thehearings or steps on the fast pulley. As shown in Figs. V, VI, and VII,the diameter of the pulley 13 is slightly in excess of the diameter ofpulley 8, that of pulley 14 in excess of pulley 13, and so on to pulley16, the diameter increasing slightly from the fast pulley 8 to thepulley 16 upon the other side. The purpose of this is to insure thateach of the frictionally-driven pulleys does its full share of the workin driving the cable, while at the same time the stretching of the cableor backward slip on the pulleys (13 14 15 16) is avoided by the backwardslip of the pulley on its hearings or step. There may be any number ofthe friction levers and shoes to each loose pulley, said shoes extendingall around, if preferred.

The guidedrum 25 is composed of one pulley, 26, made fast to the shaft27, and a number of separate loose pulleys, 28, which, by

turning freely, accommodate themselves to the cable under its differentdegrees of tension and prevent all friction from that cause.

I do not limit myself to a series of loose pul ICO leys on the steppedextension of the fixed pulley on the drive-shaft, as I mayemploy asingle loose pulley, as shown in Fig. II.

I claim as my invention 1. The combination of a drive shaft, a groovedfast pulley on the drive-shaft, said fast pulley having a steppedextension, and a grooved loose pulley on the stepped extension driven byfrietionalcontact with the fast pulley, substantially as described.

2. The combination of a drive shaft, grooved fast pulley on thedriveshaft, said fast pulley having astepped extension,and agroovedloose pulley of greater diameter on the stepped extension driven byfrictional contact with the fast pulley, substantially as described.

3. The combination of a drive shaft, a grooved fast pulley on thedrive-shaft, said fast pulley having astepped extension,and groovedloose pulleys on the stepped extension driven by frictionalcontact,substantially as described.

4. The combination of a drive-shaft, a.

grooved fast pulley 0n the driveshaft, said fast pulley having asteppedextension,and grooved loose pulleys of gradually-increasing diameter onthe stepped extension driven by frictional contact, substantially asdescribed.

5. The combination of a drive shaft, a grooved fast pulley on thedrive-shaft, said fast pulley having a stepped extension, a groovedloose pulley on the stepped extension, and a friction-brake between thefast pulley and the loose pulley, substantially as described.

6. The combination of a drive shaft, a groovedfast pulley on thedriveshaft, said fast pulley having a stepped extension, grooved loosepulleys on the stepped extension, and friction-brakes between the fastpulley and the loose pulleys, substantially as described.

7. The combination of a drive shaft, a grooved fast pulley on thedrive-shaft, said fast pulley having a stepped extension, a groovedloose pulley on the stepped extension, and a friction-brake secured tothe stepped extension and bearing against the hub of the loose pulley,substantially as described.

8. The combination of a drive shaft, a grooved fast pulley on thedrive-shaft, said fast pulley having a stepped extension, a groovedloose pulley on the stepped extension, a brakev lever having a shoebearing against the loose pulley, and an adj llSiJllJg-SCR'BW connectedindirectl y with the brake-lever, subslantiall y as described.

9. The combination of a drive shaft, a grooved fast pulley on thedrive-shaft, said fast pulley having a stepped extension, a groovedloose pulley on the stepped extension, a brakelever having a shoebearing against the loose pulley, adj usting-screw,and spring connectingthe brake-lever with the adjusting screw, substantial] y as described. I

10. The combination of a drive shaft, a grooved fast pulley on thedrive-shaft, said fast pulley having a stepped extension, a groovedloose pulley on the stepped extension, a guideshaft, and a fast pulleyand a loose pulley on the guide shaft, substantially as described.

I F. A. JOHN BEIGEL. In presence of SAML. KNIGHT,

BENJN. A. KNIGHT.

